Method of flanging pipes.



G. D. MURDOCK.

METHOD OF FLANGING PIPES.

APPLICATION FILED NOV. 4, 1908.

Patented Nov. 23, 1909.

ry-i UNITED STATES PATENT OFFICE.

'cnnnnnsn. nunn'ocx, or PHILADELPHIA, PENNSYLVANIA.

METHOD'OF FLANGIN G PIPES.

To all whom it may concern:

Be it known that I, CHARLES D. MURnooK,

end of the pipe before flanging it so as to reinforce and strengthen theflange, said colla'r beingprovided wit-h holes through which the surfaceof the pipe and the edges of the 'holes are fused so as toweld-thesleeve to the pipe before flanging.

My nnproved method will be described in detail hereinafter andillustrated in the accompanying drawings in which- Figure 1 is a view inelevation showing a fragment of a pipe with the sleeve in positionthereon, the first stepin my method,

Fig. 2, a cross section on the line a2--u of l 1g. 1 -,showin the secondstep in my 'method, -the welding of the sleeve to the pipe through theholes in thesleeve, Fig. 3, a view in elevation of a fr'agment of thepipe and of the sleeve showing the third step 1-11 111 method, flanging'the pipe and sleeve,

Fig. 4 a similar vlew showing the fourth flanged pipe showing the stepofvthe method finishing the flange and surface of the sleeve, and Fig.5, a longitudinal sectional view of a fragment of the securing ring inposition thereon.

In the drawings similar reference characters will indicate correspondingparts inthe several views.

In my improved method I take a pipe A of wrought'iron, steel or anyother yieldin material to be flanged and slip over its en a sleeve B,the sleeve being heated so as to expand it, and, after being placed, thering 'B is-chilled so as to shrink it into position on the pipe. Beforebeing placed on the pipe A the sleeve B is prov ded with any number ofholes C ofany shape or size desired so that when it is. in position onthe pipe as stated and as'shownin Fig.1 the surface of the pipe isexposed throu h said holes. I then take any suitable weldlng apparatus,such as an oxy-acetylene flame, or

Specification of Letters Patent. Application filed November 4, 1908.Serial No; 481,085.

Pennsylvanla, have inventedatentea Nov. 23,

an electric welding ap aratus, and melt or fuse the edges of the htflesC and the surface of the pipe A exposed throu h said holes. When theparts are thoroug ly melted I then fill the hole with iron, steel. orother fusible metal in a molten state by. holding a bar of the metal incontact with the o'xyacetylene flame, the carbon point of an electricwelder or. other suitable welding a aratus. When the parts have cooledit Wlll e understood that the sleeve and pipe will be efl'ectuallyjoinedat the places where welded as just described and shown at D in Fig. 2.

It will be understood that the sleeve may be secured on the pipe byheating the end of the pipe and the sleeve to a welding heat in anyconvenient form of furnace and then hammering the pipe and sleeveto'weld them together, but weldin through the 'holes 0 as abovedescribed is just as effective in securing the sleeve on the pipe andthe ex pense incident to the operation much less.

After the pipe and sleeve have been welded together as described, theend of the pipe and the sleeve are'then heated in a fire or furnace orother apparatus to nearly a welding heat and their edges turned in anysuitable manner so as to form a flange E thereon as shown in Fig. 3, theturned edges of the pipe and sleeve being thorou hly rolled so as tomake the flange E, descri 'ed, homogeneous.

The surface of the flange E and the sleeve are then ground down in anysuitable manher so as to give it a smooth finish and the surfaceof thesleeve B abutting the flange E beveled as shown at F. in Fig. 4:.

In securing the ends of the pipes together a'ring G is employed at eachend of the pipe having itsinner surface ground and beveled as shown atH, to fit the beveled surfae F of the welded on sleeve B and with aflange tightly against the sleeve when drawn into position to secure thetwo ends of pipes A vtogether as described and the strain due topressure, expansion or any other cause is equally divided over the wholebearing surface and the back of the flange E 59 that no undue or unequalstrain occurs at any point. v

In practice the rings G must be sllpped on the pipe A- before the sleeveB is placed thereon so as to be in osition to slip on to the end of thepi e as s own in Fig; 5

By my metho it will be understood that the flange E has thesame strengthas would a flange formed on a pi e of the same thickness as the combinedthicknesses of the pipe A and sleeve B without the use of the extrathickness of metal throughout the length of the pipe Where not needed 4Having thus described .my invention what I claim 1s-- 1. The method offlanging pipes which consists in securing a sleeve on the pipe, and

then bending the pipe and sleeve to form theflange,

2. The method of 'flanging pipes which consists in shrinking asleeve'onto the ipe, and then bending the pipe and sleeve to orm theflange.

3. The method of, fianging pipes which consists in welding a sleeve ontothe pipe,

and then bending the pipe and sleeve to.

form the flange.

In testimony whereof' I hereto affix my 30 signature inthe presence of'two witnesses.

CHARLES MURDOCK.

Vitnesses CHARLES H. WVHI'm uv, PAUL E. ZAHN.

